Gearing.



H. E. DEV.

GEARING. APPIICATION FILED FES. 20. ISIS.

'tion taken on lline dependent rotation,

yfor a given power,

f f ii GEARING.

Specificaton'of Letters Patent.

risente.

i y. i i

v` .rasantenreuniera. 'i i original application-mea January is, i912, serial ne. 671,994.. Divided and uns appudatioafnea February; Y..

To all whom it may coneernf i Be it known that 1, HARRY E. Der, a citizen of the United States, resi ing in Jersey in the county oflludson and State of v City 7, N ew Jersey, have invented certain new and useful llmprovements in Gearing, of which the followingis a specification.

The object of this invention is to ,change the speed ratio, `either in a like or a reverse direction, lof ,two rotating parts :mounted upon an axis common to both. f,

My invention, accomplishes this in a very compact and efficient manner.

My y present yapplication for patent isa` divisionof my pending application Serial Number 671,994,1iled January 18, 1912.

Referring to the accompanying drawings whichare designedto illustrate` one',v of the several'waysfy in v vhichI my inve `tion can be used: lFigui-.ey 15 is a longitudinal Isectional view of .an axle containing a specially designed electric motor, in which both the armature and the field magnet rotate, the mechanical movement upon which the invention =is based; Fig. 2 is a cross section taken on the line A-B; Fig. 3 is across sec- C-D; Fig. l isa cross section on line ETF; Fig. 5 shows an alternative hub that may be substituted for the one shown in Fig. 1.

lt prefer to use a moto-r in which the field magnet andthe armature both rotate, and thus, by connecting the field to drive one wheel and the armature to drive the other, avoid the use of a vdidere'n'tial gear for infor the'moto'r then acts as a perfect differential device. `As the armature and the field rotate in opposite directionsthe reduction gearing has to be; so constructedtliat the motion of one element is reversed in ltransmitting 'to the wheel, while` that of the other ted without change of direction.

The, motor yis preferably mounted with its axis coinciding with the center line of ther axle; and' in its construction differs :from most motors by having itsield magnet \inside, and the armature outside in the form of a gram ring." Thisform of construction produces a motor very" light in weight ing advantages combined -with water proof construction.

The field ,magnet 1 is mounted uponthe shatZ, and is energized by coil 3. Collect means ofproper and l elementis transmitand also has great cooldriven member is independent 420,1915,.seiiaiimsyea Ling rings 4;, 41,.tfand lif serveto takethe e current from conducting, brushesland, by.

brushes. The armaturecore `is,represei'ited conductors, transmit ,it tofy the field terminals andfthe commutator 5 0 vby 5 and the coils by 6,y the commutator', l and the commutator brushes 8 and'," The casing 9 slopes down, in the form o f a cone,

and terminates in the rotatory shaft 1(), of

which it is a part. An eccentric 11, is rigidly carried by, being keyed, upon the shaft 10, and sleeved over the eccentric is a set of rollers 12, comprising a roller bearing. The latter is surrounded by a casing 13, having an enlarged portion projecting over the ends of the rollers and inclosing a gyratory gear of the internal type 1a, which meshes with gear 15. As shown in the. drawings the gear 14 is thus, in effect, rotatably carried by the eccentric member'in a planetary orbit, the rollers relieving friction and faciliV tating slight play between the parts. The. gear 15 is of the external type and is fixed to the axle, being thus unrotata'bly supported thereby.- The roller bearing 1G, shown inside of gear 15, shaft 10, which is, as shown, located proximate the longitudinal center of the axle.

gear end with which is universally iointed a member, hown in the drawings as a Candan shaft 17.

The unrotatable axle is made upV from the assembly of the framework, a, gear casings Z') and b', the tubular sections c and c', and the yokes d' and d. The latter is not shown, as the two hubs and attachments are duplicates. 1 U

The cylindrical piece 19,is, proximate one of the ends of the axle, trunnioned inftheyoke al, and carries within lit `the ball bear? ings ZOand 21 inside of which is rotatable the cylindrical part, or driven member 22, with which is universally jointed the other terminal end of the Cardan shaft 17. 22 being thus supported by the axle independently of the shaft 10. QQ is rigidly attached to the hub of the wheel 9.3 by means of the i 1t will be noted that the constlr'uction is such that the driving shaft 10 does not carry the driven member 22. That is to say the of the shaft the 'gyratory drivfar vas said driven which transmits power to ing gear le, except in so is used for supporting the lThe casing 13, has .an extension opposite the i t1on, universally jointed with and constantly influencedby, a therewith rotatable longitudinally extended connection-or shaft, which is likewise constantly influenced by, and universally jointed with, driving gear at'approximately the latters axis of rotation. It results that the said connection, or shaft, is always inclined relatively to both of said axes, and rotates on its own axis while moving in what is substantially a cone-shaped path, the'apex of which coincides with the axis of rotation of the driven member, and its base with the planetary4 orbit of the gear 14. It will 'also be noted that lthe said means employed to so unite the gyrato-ry driving gear with the driven member, are, as indicated by the uni- -versal `joints of the Cardan shaft, universally flexible,'relatively to the parts thereby oper,- atively joined. These noted features of the construction serve to increase power effi-1 ciency, to abort shocks transmitted from the wheel 23, .to insure regularity of movement in the driving mechanism, and to dispense straightening out devices for the type of gears referred to.

Mounted upon the eld shaft 2, is the eci centric 11,"which is supported Aby the roller bearing 16. Sleeved upon the eccentric portion is the external gear 14 with the roller bearing 1 2 inserted between them. This gear 14') meshes with the internal gear 15', which is fixed to the unrotatable axle 18.

Gear 14 is provided with the universal j ointi extension in the same manner as 1n and from this point to the wheel struction is a the axle.

The operation of the gear 14, duplicate of the otherend of lows: Eccentric 11, which 1s mounted o nthe` armature'shaft, gear 14, the pitch line rolling around the pitch line of gear 15. If both gears were Supplied with the same number of teeth, gear 14 would have no rotary motion and would simply keep contacting around different points of the periphery, but, as the larger gear has a greater number of teeth it is caused to rotate upon its own axis, in the same direction as the driving gear, at a slow speed of revolution; the nearer the diameters-are to being equal, the slower the gear 14 will rotaf i' in other words, the greater the speed ratio of reduction will be. The axis of gear 14 rotates in an orbit of its own around the center line of the axle, with a radius equal to the eccentricity of the eccentric. Gearing of this type up to this point'is. ynot new, but the former methods of transmltting the power from the rotary gear has met with the objection thatithad low power efficiency and the motion was irregular, un

less two additional gears were inserted. By

transmittingothe power by means of anni# the gyratory f is often found to this reason I have shown the the conwheel with said said wheel with said versal jointed shaft, however, the motion is absolutely uniform, and', as I have found by experience, is very eiicient. The Cardan shaft 17 yieldingly transmits the power from the gear to the hub of the wheel, as will readily b'e seen from the drawing.

In transmitting the power from the field shaft it is desired to reverse the direction of rotation, and to accomplish this the following changes are necessary; the gear '14 which rotates upon the eccentric l1 is of the external type, linstead of internalas used upon the other end, and meshes with the internal gear 15', which is fixed; the Cardan shaft is attached to the gear 14, and from that point to the hub the construction isa duplicate ofl that at the other end.

Steering and driving combined in one axle be desirable, as, for example, when driving by all four wheels; for

wheel pivoted in a fork of'the axle with all provision made for the combinedsteering .and driving. In Fig. .5; I have shown the construction as it would be with the steering provided for in a separate axle.

1s applicable to speed differentiation in other connections and for other purposes than as above specifically described. For example, it may be employed in connection with electrical or other power,- means to drive a single propelling element as for example, the propeller of a motor boat, etc.

' `claim .as myinvention l. In combination in a vehicle, an axle, a driving shaft proximate the longitudinal center of,I and concentric with, said axle; means to rotate said gear of the external type concentric with saidvshaft; carried by saidshaft a gyratory gearof the internal type in mesh with said first mentioned gear; a tractor wheel'proximate one of the ends of said axle; and means,l comprising a universally jointed shaft, to operatively gyratory gear.

2. In combination in a vehicle anaxle; a driving shaft supported bysaid axle proximate its longitudinalcenter; means to rotate said shaft; an unrotatable gear of the external type supported by said axle and concentric with said shaft; a gyratory gear of the internal type carried by said shaft and in mesh with said first mentioned gear; a tractor wheel supported by said axle proximate one of the ends thereof; and means, comprising a universally jointed shaft, to, constantly, operatively, unite the hub of gyratory gear.

3 In combination, a driving shaft; means to rotate said shaft; an unrotatable gear concentric with said shaft; a rotatable gear eccentrically carried by said shaft and in 'mesh with said first mentioned gear; a

shaft; an unrotatable 'l0 trieally carried driven member; ineansto rotatably support "said dri-ven member independently of said driving shaft; and means, comprising la unlversally jointed shaft, to, operatively, unite said driven member with said rotatable gear.

4. ln combination, a driving sha-ft, means to rotate said shaft; an unrotatable gear of the external type concentric with Said shaft; a rotatable gear of the internal type eocen by said shaft in mesh with Copeso this patent may be obtained for five cents each, by aduressing the shaft, to, operatively, unite said driven n'ienbei' with Said rotatable gear.

. HARRY E. DE Y. Nitnesseez lnimr O. Piron,

WILLIAM J. HOPKINS.

Commissioner o? latents,

Washington, D. C. 

